Style update

changed the css to add the same 10px margin at the bottom of each
section
Reformatted the index of the page and fixed the credits section
slovenian translation link added
Trim install instructions, add Windows installer
added PHP and UTF-8 section
declared utf charset in the connection string

Also updated code example to match phpbestpractices.org example
Mysql driver: Changed from long term deprecation in 5.4 to deprecated in 5.5

Changed mysql driver deprecation information from planned long term deprecation in 5.4 to officially deprecated in 5.5. Source: http://us2.php.net/manual/en/migration55.deprecated.php. It's official :)
Merge pull request #364 from elliottb/patch-1

Mysql driver: Changed from long term deprecation to deprecated in 5.5
Typo in 06-01-01-Dependency-Injection.md
Added Hoa
Update 13-03-01-Components.md
Added simple CONTRIBUTING.md.
Mention the book.
Merge pull request #366 from codeguy/feature/contributing

Added simple CONTRIBUTING.md.
Formatting
Can't spell.
xdebug link typo fixed
Merge pull request #367 from peterkokot/patch-3

xdebug link typo fixed
Update 08-02-01-Errors.md
Add return to main page link at bottom of page layout.